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NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 687
there may be as many as 3 to an internode. In the narrower internodes
they may be as simple as those of Crisia (though more embedded), with
a terminal ooeciostome which is smaller than a peristome and may
terminate simply, or the rim may be expanded and slightly bell-shaped,
the pore round. On broader internodes the ovicells are more expanded
laterally and sometimes extend beyond the ooeciostome, and occasionally
a few of the neighboring peristomes are surrounded.
". . . at low tide almost anywhere on the coast of Southern California.
... It has been dredged off the coast, from San Pedro to San Diego in
depths ranging from 2 to 17 fathoms." (Robertson). Okada has recorded the species from the Bay of Sagami, Japan, and Marcus reports
it from Santos Bay, Brazil.
Hancock Stations: Dredged at 28 stations, all the way from Point
Conception, California to Peru. Station 844-38, Lobos de Afuera
Islands, Peru, 6°55'40"S, 80°43'50"W, shore to 30 fms, the most
southerly record; 31-33, Hood Island, Galapagos, 1°22'52"S, 89°39'
15"W, at 4 fms; 308, Bahia Honda, Panama; Clarion Island, west of
Mexico; 7 stations in the Gulf of California; Dewey Channel west of
Lower California; and abundant about the Channel Islands off southern
California as well as along shore; from low tide mark to a depth of
47 fms.
Division 3. Gancellata Gregory, 1896
(Pachystega Borg, 1926)
The Horneras etc.
The primary zoid is erect but not separated from the ancestral disc
by a joint; the zoarium is not jointed, erect, usually branched like a
tree. The "wall of zoarium double, consisting of a gymnocyst and cryp-
tocyst, the latter undergoing a process of secondary calcification, by
which the zoarium in its older parts becomes very strongly calcified."
(Borg, 1944:175). The ovicell or brood-chamber is a much expanded
gonozoid, usually situated on the dorsal side or between two branches.
Borg (1944:179) included the families Horneridae and Crisinidae,
and erected three new families, Steghorneridae, Pseudidmoneidae and
Calvetiidae, but did not discuss the Cytisidae.
The only families we have to deal with are the Horneridae and
Cytisidae.

NO. 3 OSBURN : EASTERN PACIFIC BRYOZOA CYCLOSTOMATA 687
there may be as many as 3 to an internode. In the narrower internodes
they may be as simple as those of Crisia (though more embedded), with
a terminal ooeciostome which is smaller than a peristome and may
terminate simply, or the rim may be expanded and slightly bell-shaped,
the pore round. On broader internodes the ovicells are more expanded
laterally and sometimes extend beyond the ooeciostome, and occasionally
a few of the neighboring peristomes are surrounded.
". . . at low tide almost anywhere on the coast of Southern California.
... It has been dredged off the coast, from San Pedro to San Diego in
depths ranging from 2 to 17 fathoms." (Robertson). Okada has recorded the species from the Bay of Sagami, Japan, and Marcus reports
it from Santos Bay, Brazil.
Hancock Stations: Dredged at 28 stations, all the way from Point
Conception, California to Peru. Station 844-38, Lobos de Afuera
Islands, Peru, 6°55'40"S, 80°43'50"W, shore to 30 fms, the most
southerly record; 31-33, Hood Island, Galapagos, 1°22'52"S, 89°39'
15"W, at 4 fms; 308, Bahia Honda, Panama; Clarion Island, west of
Mexico; 7 stations in the Gulf of California; Dewey Channel west of
Lower California; and abundant about the Channel Islands off southern
California as well as along shore; from low tide mark to a depth of
47 fms.
Division 3. Gancellata Gregory, 1896
(Pachystega Borg, 1926)
The Horneras etc.
The primary zoid is erect but not separated from the ancestral disc
by a joint; the zoarium is not jointed, erect, usually branched like a
tree. The "wall of zoarium double, consisting of a gymnocyst and cryp-
tocyst, the latter undergoing a process of secondary calcification, by
which the zoarium in its older parts becomes very strongly calcified."
(Borg, 1944:175). The ovicell or brood-chamber is a much expanded
gonozoid, usually situated on the dorsal side or between two branches.
Borg (1944:179) included the families Horneridae and Crisinidae,
and erected three new families, Steghorneridae, Pseudidmoneidae and
Calvetiidae, but did not discuss the Cytisidae.
The only families we have to deal with are the Horneridae and
Cytisidae.